Root filesystem is going to read-only mode after executing "umount -a" on Red Hat Enterprise Linux

Solution In Progress - Updated -

Issue

  • Root filesystem is going to read-only mode after executing "umount -a" or umount / on Red Hat Enterprise Linux. 
[root@dhcpxxx ~]# cat /proc/mounts | grep LogVol00
/dev/mapper/vg_dhcp200220-LogVol00 / ext4 rw,seclabel,relatime,barrier=1,data=ordered 0 0
-- 
-- 
Executing umount /

[root@dhcpxxx ~]# umount /
[root@dhcpxxx ~]# cat /proc/mounts | grep LogVol00
/dev/mapper/vg_dhcp200220-LogVol00 / ext4 ro,seclabel,relatime,barrier=1,data=ordered 0 0

Environment

  • Red Hat Enterprise Linux 6,7
  • /, /var/, /tmp are on separate filesystems
  • umount -a or umount / executed on a running system that is working normally

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